Scary!

calypso · Post by **calypso** » 17 Jul 2006, 08:21

http://www.milaadesign.com/wizardy.html

Post by **Garry Russell** » 17 Jul 2006, 08:27

That's creepy......how on earth does it get the number?

Garry

calypso · Post by **calypso** » 17 Jul 2006, 08:46

There have been quite a few similar ones on the net Garry.

This one is rather clever, until you twig on the maths . . . . . . . .

TobyV · Post by **TobyV** » 17 Jul 2006, 10:15

Tried it three times and even tried to cheat and I'm scared now (especially since it seems to have arabic all round the screen

).

Right then, choosing any two digit number is rather like choosing any two separate numbers with the proviso that the first one is non-zero. So if we call the first digit x and the second y, then our two digit number is:

10x + y

Adding the two digits together and substracting the from original:

10x + y - (x + y)

I reckon theres probably quite a limited number of answers, and therefore symbols that it could be :think:

For example anything from 10 to 19 will always give 9 as the answer. Theres no way that the computer could actually 'know' what you picked, so I'm willing to bet that as long as you look at a possible answer (e.g. 9) whilst your real answer is another plausible one, then eventually you will beat it, I think!

TobyV · Post by **TobyV** » 17 Jul 2006, 10:17

Infact I am being a schmuck here, opening the brackets from my equation above, the - (x + y) infact becomes, -x - y.

Thus my equation reduces to 9x. So all the answers have to be multiples of 9

TobyV · Post by **TobyV** » 17 Jul 2006, 10:20

And looking quickly, most of the multiples of 9 have the same symbol

Case closed.

(Sorry for spoiling it)

andy · Post by **andy** » 17 Jul 2006, 10:56

.....and I've spent all of my life, wondering what the hell algebra would be useful for???

Post by **Garry Russell** » 17 Jul 2006, 11:13

:k:

Garry

calypso · Post by **calypso** » 17 Jul 2006, 11:26

What makes it more effective is the fact that it changes the symbol for the multiples of 9, every time you run it.

Post by **Garry Russell** » 17 Jul 2006, 11:36

Ah.yeah I forgot about that number thing where the components added together and subtracted from the number gives a multiple of nine and by changing that simple stops you twigging it straight away.

For a minute I thought it knew what I was thinking a bit like my ex wife

...the maths to explain that have not yet been invented

Perhaps the laws of maths and physics etc are different on her planet :think:

Garry